runrig++ idea looks right. in OP's code, strptime() interprets the input value as a local time. It then subtracts 3 hours to get the output GMT epoch value.

I ran this code myself and in my time zone, I get the following result: 

use strict;
use warnings;
use Time::Piece;
my $x = '1415998800';
my $t = Time::Piece->new();
print Time::Piece->VERSION, "\n";
$t = $t->strptime( $x, '%s' );
print "Input $x\n";
print "Output ".$t->epoch(), "\n";
print $t, "\n";
print $t->strftime, "\n";
print "daylight savings flag is:",$t->daylight_savings, "\n";

__END__
1.30
Input 1415998800  <- interpreted as a local time
Output 1416027600 <- 8 hours ahead of input
Fri Nov 14 21:00:00 2014
Fri, 14 Nov 2014 21:00:00 Pacific Standard Time
daylight savings flag is:0

[download]
What I don't understand is why Time::Piece doesn't know that currently Daylight Savings time is in effect? Right now, GMT is only 7 hours ahead of us instead of 8. I am on Windows and my clock in taskbar shows the right time (PSDT).

Update: I found out that if you call strptime() as a Class method, instead of as an object method, GMT is assumed. Otherwise the object's timezone is used, i.e. changing: 

$t = $t->strptime( $x, '%s' ); ## to:
$t = Time::Piece->strptime( $x, '%s' );

[download]
produces: 
1.30
Input 1415998800
Output 1415998800
Fri Nov 14 21:00:00 2014
Fri, 14 Nov 2014 21:00:00 UTC
daylight savings flag is:0

[download]

In reply to Re: Time::Piece epoch parsing by Marshall
in thread Time::Piece epoch parsing by vsespb

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